It issued a warning for the western Aleutians Islands from the villages of Nikolski to Adak and warned that people in low-lying coastal areas should remain alert to instructions from local emergency officials.

Adak is a community of 167 about 1,300 miles southwest of Anchorage. Nikolski is a village of 31 about 900 miles southwest of Anchorage.

The warning center issued a tsunami watch for the rest of the Aleutians and coastal areas along south-central Alaska to Seward.

Japan's Meteorological Agency issued tsunami warnings following the quake. The agency said waves as high as 3.3 feet could hit the northeastern coast of Japan's northern island of Hokkaido.